Procedures in employment psychology

Bibliographic data

Monograph

Identifikator:: 173623112X

URN:: urn:nbn:de:zbw-retromon-112923

Document type:: Monograph

Author:: Bingham, Walter Van Dyke http://d-nb.info/gnd/123042593; Freyd, Max

Title:: Procedures in employment psychology

Place of publication:: Chicago & New York

Publisher:: Shaw

Year of publication:: 1926

Scope:: XI, 269 S

Digitisation:: 2020

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: XIV. Validation of the measuring instruments (concluded)

Collection:: Economics Books

I. EMPLOYMENT PSYCHOLOGY which are used when the number of cases is small, when the divisions are alternative rather than continuous, or when the measures are in terms of ranks. The method of rank difference takes into account only the positions of the measures in the series, and should be used when the measures are expressed as ranks. There are two formulas: Spearman’s method of rank differences: (17) ptm N(N2—1) where D represents any difference in the rank of a person in the two series of measurements, and IV represents the num- ber of paired measurements; and his “footrule for correla- tion”: 6Zg (18) R=1 TR where g represents only differences in ranks where there is a gain in the second series over the first. Both p and R may be converted into 7 by use of tables provided in most text- books on statistics, based on formulas derived by Pearson (see Tables 5 and 6). The conversion of p into r has doubt- ful value since the difference will usually be much less than the probable error of the correlation coefficient. For ex- ample, a p value of .48 has an r value of .50, but the prob- able error of a correlation coefficient of .50 with 30 cases is .09. Since the error of the coefficient is so much greater than the correction to obtain 7, it would have been just as well to leave it as p. The Scott Company (164) published con- venient tables to shorten the labor of calculating p. These tables are reproduced in the Appendix as Tables 3 and 4. Instructions for their use are given below. INSTRUCTIONS FOR CALCULATING RANK DIFFERENCE COEFFICI- ENTS (ForMuULA 17) WITH THE USE OF TABLES 3, 4, AND 5. (SEE REFERENCE 164). 1. Arrange each of the two series of measurements to be corre- lated in rank order. Every pair of measurements is thus repre- 78

Access restriction

Copyright

fullscreen: Procedures in employment psychology

Monograph

Chapter

Table of contents

Download

Monograph

Chapter

This page

Image fragment

Citation links

Citation recommendation